The Yeastar S2 Module is a high-performance expansion component designed to add analog internal extension connectivity to your Yeastar S-Series or P-Series PBX. Featuring two FXS (Foreign Exchange Station) ports, the S2 module allows your modern VoIP system to drive traditional analog telephones, cordless DECT phones, or legacy fax machines. This is an essential hardware upgrade for businesses that want to enjoy the power of an IP-PBX while continuing to use their existing, high-quality analog hardware.
Each S2 module provides two RJ11 ports, allowing you to connect up to two physical analog devices directly to your PBX as internal extensions.
Features advanced line echo cancellation (LEC) to ensure that voice transmission between analog devices and the digital PBX remains crisp, clear, and professional.





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